Apparatus for twisting textile fibers

Abstract

Two closely spaced apart, perforated suction drums are provided, which have parallel axes and confronting peripheral surface portions defining between them a region which is triangular in cross-section and adapted to receive fibers flying through a flight region which precedes said triangular region in a direction that is transverse to said axes. Suction means are operable to provide a suction zone in each of said confronting peripheral surface portions. Said drums are operable to rotate in the same sense so that fibers received in said triangular region and attracted to said suction zones by the operation of said suction means are twisted together by said drums to form a yarn. Yarn-withdrawing means are operable to withdraw said yarn from said triangular region toward one end thereof while holding said yarn against rotation. A throwing member is operable to move in said flight region toward said one end thereof in a plane which is transverse to said direction.

What is claimed is: 
     
       1. Apparatus for spinning textile fibers, comprising two closely spaced apart, perforated   suction drums having parallel axes and confronting peripheral surface portions defining between them a region which is triangular in cross-section and adapted to receive fibers flying through a flight region which precedes said triangular region in a direction that is transverse to said axes,   suction means operable to provide a suction zone in each of said confronting peripheral surface portions,   said drums being operable to rotate in the same sense so that fibers received in said triangular region and attracted to said suction zones by the operation of said suction means are twisted together by said drums to form a yarn,   said apparatus comprising further   yarn-withdrawing means operable to withdraw said yarn from said triangular region toward one end thereof while holding said yarn against rotation, and   a throwing member which is operable to move in said flight region toward said one end thereof in a plane which is transverse to said direction.   
     
     
       2. Apparatus as set forth in claim 1, which comprises fiber-delivering means for causing delivering fibers to fly in said direction into said flight region. 
     
     
       3. Apparatus as set forth in claim 2, in which said flight region is defined on opposite sides thereof by two spaced apart guide walls which are disposed between said fiber-delivering means and said triangular region and extend parallel to said axes and toward said triangular region. 
     
     
       4. Apparatus as set forth in claim 1, in which said flight region is defined on opposite sides thereof by two spaced apart guide walls which extend parallel to said axes and toward said triangular region. 
     
     
       5. Apparatus as set forth in claim 1, in which said throwing member consists of a disc which is rotatable to dispose only a peripheral segment of the rotating disc in said flight region. 
     
     
       6. Apparatus as set forth in claim 5, in which said flight region is defined on opposite sides thereof by two spaced apart guide walls which are disposed between said fiber-delivering means and said triangular region and extend parallel to said axes and toward said triangular region. 
     
     
       7. Apparatus as set forth in claim 5, in which said disc is formed with teeth at its periphery. 
     
     
       8. Apparatus as set forth in claim 7, in which said teeth define a root circle and said disc is disposed so that said rooth circle is disposed entirely out of said flight region. 
     
     
       9. Apparatus as set forth in claim 8, in which said flight region is defined on opposite sides thereof by two spaced apart guide walls which are disposed between said fiber-delivering means and said triangular region and extend parallel to said axes and toward said triangular region.